Abstract
The article deals with a theoretical expression of resistances that occur in pushing loose material off the conveyor belt surface with a single-sided plough. The working branch of a belt conveyor is designed in a flat, single-idler arrangement. Theoretical prerequisites and derivations are practically tested on a belt conveyor model in the laboratory of the Department of Research and Testing of the Institute of Transport at the Engineering Faculty of VSB-TU in Ostrava.
Highlights
Discharging of conveyed materials out of a belt conveyor may be performed using three basic methods: the conveyed material is most often discharged through the end drum of the belt conveyor (Fig. 1,a) [4]; if discharging the material at a certain point of the conveyor track is required that may have any distance along the length of the track, ploughs are used (Fig. 1,b)
The peripheral force F [N] on the driving drum of the belt conveyor is given by the sum of partial resistances that may be defined, according to [5-8], as: Main resistance FH [N], resistance from material lifting FSt [N], secondary resistance FN [N], and additional main FS1 [N] and secondary resistances FS2 [N]
The maximum increase value of peripheral force ΔF [N] on the driving drum of the belt conveyor occurs if the single-sided plough is located perpendicularly to the conveyor belt’s longitudinal axis ( = 90 [deg], see Fig. 3,a)
Summary
Discharging of conveyed materials out of a belt conveyor may be performed using three basic methods: the conveyed material is most often discharged through the end drum of the belt conveyor (Fig. 1,a) [4]; if discharging the material at a certain point of the conveyor track is required that may have any distance along the length of the track, ploughs (singlesided and double-sided) are used (Fig. 1,b). For a continuous discharge of conveyed material along the entire length of the belt conveyor, tripper cars are used (Fig. 1,c)
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